What makes it quietly remarkable is how thoroughly it has slipped through the documentary record. It does not appear on any Ordnance Survey historic maps, and it carries no annotation or reference number on the aerial survey image in which it was first identified. For most of its existence, it was simply there, unremarked, folded into improved pasture, its outline surviving not as visible earthworks but as a cropmark, the kind of subtle discolouration in growing crops that reveals buried features only from the air or through satellite imagery.

The monument was first picked up during the Bruff aerial photographic survey of 1986, though even then it was not formally catalogued from that image. It took subsequent remote sensing to bring it into focus. A Digital Globe orthoimage captured between 2011 and 2013 shows the enclosure clearly as an oval shape measuring 28 metres on its north-east to south-west axis and 21 metres on its north-west to south-east axis. A Google Earth image from September 2020 confirmed the same outline as a cropmark of similar dimensions. The site was compiled into the record by Alison McQueen and Vera Rahilly and uploaded to the Sites and Monuments Record in November 2020. The enclosure sits within an exceptionally dense concentration of prehistoric activity. Within a few hundred metres lie standing stones, two further enclosures, a field system, an ancient trackway known as Cladh na Leac running north to south roughly 45 metres to the east, and three stone circles to the south and south-south-west. The whole cluster orbits the broader Lough Gur landscape, one of the most intensively occupied prehistoric territories in Ireland.

There is nothing to see at ground level in any conventional sense. The enclosure survives as a buried feature, and the improved pasture that covers it shows no obvious surface trace. The interest here is more conceptual than visual: a monument that existed for millennia without being formally noticed, identified finally not by excavation or fieldwork but by the patient comparison of aerial photographs taken decades apart. The surrounding area around Lough Gur is publicly accessible and well worth exploring for its visible monuments, and understanding that this earthwork on Ardaghlooda sits quietly among them, unannounced and unmarked, adds a particular dimension to the landscape.